Report on Schedule A; Chemicals, Oils, and Paints

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...Black pigments are indispensable in the manufacture of paints, japans, oil enamels, printers' ink, paper, and in many other industries. Their value, as that of all other colors, depends on purity of shade, depth, and strength. They are sold either dry or in paste form ground in oil. Blacks are manufactured in this ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...Black pigments are indispensable in the manufacture of paints, japans, oil enamels, printers' ink, paper, and in many other industries. Their value, as that of all other colors, depends on purity of shade, depth, and strength. They are sold either dry or in paste form ground in oil. Blacks are manufactured in this country extensively. The census for 1905 gives the production of blacks as 20,298,385 pounds, but the value given as $640,701, or very little more than 3 cents per pound, would indicate that this figure represents largely bone black, with little of the finer grades included. BLACK, MADE FROM BONE, IVORY, OR VEGETABLE SUBSTANCE. INCLUDING BONE BLACK AND LAMPBLACK, DRY OR GROUND IN OIL OR WATER. Paragraph 46.--CHROMIUM COLORS. Chrome yellow, chrome green, and all other chromium colors in the manufacture oi which lead and bichromate of potash or soda are used, in pulp, dry, or ground in or mixed with oil or water, four and three-eighths cents per pound. This valuable pigment, obtained in shades from deep orange to light canary yellow, is made by mixing solutions of sodium or potassium diromate or bichromate (mostly the former), and of sugar of lead or other soluble lead salt. The pigment falls out in insoluble form. By varying the conditions to suit his special purpose the manufacturer is enabled to produce the shade of yellow desired. In many instances 29642--H. Rept. 326, 62-2 16 the pigment is precipitated upon a white carrier (artificial or natural barium sulphate), or the pigment is often only just mixed with it in widely varying proportions. One hundred pounds of sodium bichromate and 250 pounds of lead salt will give 215 pounds of pure chrome yellow. Chrome yellow is marketed dry and mixed with water or oil. Its use is similar to those of othe...
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